Hybrid induction motor

Abstract

A hybrid induction motor includes a motor casing; a rotational shaft rotatably coupled with the motor casing; an induction rotor rotated by being integrally coupled with the rotational shaft and having a rotor core and a conductor bar inserted in the rotor core; a stator having a hollow into which the induction rotor is inserted and installed with a certain length in a direction of the rotational shaft; a first magnetic rotor inserted between the stator and the induction rotor and coupled with the rotational shaft so as to be freely rotatable; a second magnetic rotor inserted between the stator and the induction rotor so as to be symmetrical with the first magnetic rotor and coupled with the rotational shaft so as to be freely rotatable; and a magnetic spacer inserted between the first and second magnetic rotors.

1. A hybrid induction motor comprising:
 a motor casing; 
 a rotational shaft rotatably coupled with the motor casing; 
 an induction rotor having a rotor core integrally coupled with the rotational shaft and rotated and a conductor bar inserted in the rotor core; 
 a stator having a hollow into which the induction rotor is inserted and installed with a certain length in a direction of the rotational shaft; 
 a first synchronous rotor inserted between the stator and the induction rotor and coupled with the rotational shaft so as to be freely rotatable; 
 a second synchronous rotor inserted between the stator and the induction rotor so as to be symmetrical with the first synchronous rotor and coupled with the rotational shaft so as to be freely rotatable; and 
 a magnetic spacer inserted between the first and second synchronous rotors. 
 
   
   
     2. The motor of  claim 1 , wherein the magnetic spacer has a thickness of 0.5 to 1 mm. 
   
   
     3. The motor of  claim 1 , wherein the magnetic spacer is made of a material of one of iron, nickel and cobalt that can be easily magnetized or made by mixing two or more materials of iron, nickel or cobalt. 
   
   
     4. A hybrid induction motor comprising:
 a motor casing; 
 a rotational shaft rotatably coupled with the motor casing; 
 an induction rotor rotated by being integrally coupled with the rotational shaft and having a rotor core at which a plurality of sheets are stacked and a conductor bar penetrating the rotor core so as to be inserted therein; 
 a stator having a stator core at which a plurality of sheets having a hollow, into which the induction rotor is inserted, are stacked in a direction of the rotational shaft, and main winding and sub-winding wound in a circumferential direction within the stator core; 
 a first synchronous rotor inserted between the stator and the induction rotor, coupled with the rotational shaft so as to be freely rotatable, and having a first cylindrical magnet with a certain thickness and a first holder formed in a cup shape and supporting the first magnet; 
 a second synchronous rotor inserted between the stator and the induction rotor so as to be symmetrical with the first synchronous rotor, coupled with the rotational shaft so as to be freely rotatable, and having a second cylindrical magnet installed spaced apart from the first magnet and having a certain thickness and a second holder formed in a cup shape and supporting the second magnet; and 
 a magnetic spacer positioned between the first and second magnets. 
 
   
   
     5. The motor of  claim 4 , wherein the magnetic spacer has a thickness of 0.5 to 1 mm. 
   
   
     6. The motor of  claim 4 , wherein the magnetic spacer is made of a material of one of iron, nickel and cobalt that can be easily magnetized or made by mixing two or more materials of iron, nickel or cobalt. 
   
   
     7. A hybrid induction motor comprising:
 a motor casing; 
 a rotational shaft rotatably coupled with the motor casing; 
 an induction rotor rotated by being integrally coupled with the rotational shaft and having a rotor core and a conductor bar inserted in the rotor core; 
 a stator having a hollow into which the induction rotor is inserted and installed with a certain length in a direction of the rotational shaft; 
 a first synchronous rotor inserted between the stator and the induction rotor and coupled with the rotational shaft so as to be freely rotatable; 
 a second synchronous rotor inserted between the stator and the induction rotor so as to be symmetrical with the first synchronous rotor and coupled with the rotational shaft so as to be freely rotatable; and 
 a magnetic spacer inserted between the first and second synchronous rotors, having a thickness of 0.5 to 1 mm, and made of a material of one of iron, nickel and cobalt that can be easily magnetized or made by mixing two or more materials of iron, nickel or cobalt.